Move Snapshots struct and policy to other files

src/restic/snapshot.go

@@ -172,6 +172,24 @@ func (sn *Snapshot) SamePaths(paths []string) bool {
 	return sn.HasPaths(paths)
 }
 
+// Snapshots is a list of snapshots.
+type Snapshots []*Snapshot
+
+// Len returns the number of snapshots in sn.
+func (sn Snapshots) Len() int {
+	return len(sn)
+}
+
+// Less returns true iff the ith snapshot has been made after the jth.
+func (sn Snapshots) Less(i, j int) bool {
+	return sn[i].Time.After(sn[j].Time)
+}
+
+// Swap exchanges the two snapshots.
+func (sn Snapshots) Swap(i, j int) {
+	sn[i], sn[j] = sn[j], sn[i]
+}
+
 // ErrNoSnapshotFound is returned when no snapshot for the given criteria could be found.
 var ErrNoSnapshotFound = errors.New("no snapshot found")
 

src/restic/snapshot_policy.go

@@ -6,24 +6,6 @@ import (
 	"time"
 )
 
-// Snapshots is a list of snapshots.
-type Snapshots []*Snapshot
-
-// Len returns the number of snapshots in sn.
-func (sn Snapshots) Len() int {
-	return len(sn)
-}
-
-// Less returns true iff the ith snapshot has been made after the jth.
-func (sn Snapshots) Less(i, j int) bool {
-	return sn[i].Time.After(sn[j].Time)
-}
-
-// Swap exchanges the two snapshots.
-func (sn Snapshots) Swap(i, j int) {
-	sn[i], sn[j] = sn[j], sn[i]
-}
-
 // ExpirePolicy configures which snapshots should be automatically removed.
 type ExpirePolicy struct {
 	Last    int      // keep the last n snapshots